The Celtics offered him double what the Heat put on the table, he just wanted to leave which is fine and was his right as a free agent, no need to try to justify it with comments like this.

It was a business decision and the team put me in the position where we had to move. We had to go. Miami was a better choice for us based on what the team was doing, so it wasn’t, don’t boo me, boo the team in a sense. Now it’s out of my control. … When this contract situation came down, everybody in my circle — mom, family, brother, sister, friends from college, people who watched me since I was in high school and since I was in college — nobody wanted me to resign in that situation because they thought, ‘There [is] so much left in you and this team isn’t taking care of you or treating you right.’ That’s the way I felt and it was like, if you are going to come and not put out a good contract on the table then, hey, we gotta think about going somewhere else.”

I personally don’t think Allen has a lot left in the tank. He will hit some open 3s, but he is living off his name.